Maybe Write It Down, Magpie!

In July, 2018, the dead body of an emaciated man was discovered in a tent on a Florida hiking trail. Everything about this death was a mystery, including the manner of death, and, especially who he was. An investigation leads to hundreds of fellow hikers to come forward with pictures and stories of said hiker, but no one knew his name. The only name he gave was "Denham" and "Mostly Harmless."

Reference:
The Called Him Mostly Harmless
Max